Definition - What does Chief Justice mean?
Chief Justice refers to the name given to a judge who is often the most senior and the presiding judge of a Supreme Court. In United States and many other countries, it is the duty of the president to select the Chief Justice, which is also later confirmed by the senate.
Justipedia explains Chief Justice
The person in this prestigious position is responsible to set the overall tone for other courts, to look after the staff and management of courts, and more. The Chief Justice usually serves for a longer period of time or until they retire voluntarily.